Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1486 (LIGHTING SYSTEMS)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 1486 (Lighting Systems)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 1486 (Lighting Systems)
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Lighting Systems
- Diagnostic System Check - Lighting Systems
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B0502
- DTC B0503
- DTC B0507
- DTC B0508
- DTC B2403
- DTC B2408
- DTC B2482
- DTC B2483
- DTC B2578
- DTC B2583
- DTC B2647
- DTC B2648
- Symptoms - Lighting Systems
- Backup Lamps Always On
- Backup Lamps Inoperative
- Courtesy Lamps Always On
- Courtesy Lamps Inoperative
- Fog Lamp Indicator Inoperative
- Fog Lamps Always On
- Fog Lamps Inoperative
- Hazard Lamps Always On
- Hazard Lamps Inoperative
- Headlamp Door(s) Inoperative
- Headlamps Inoperative - High Beams
- Headlamps Inoperative - Low Beams
- Headlamps Inoperative - Low and High Beams
- High Beam Indicator Inoperative
- Instrument Panel (I/P) Compartment Lamp Inoperative
- Park Lamps Inoperative
- Rearview Mirror Lamp(s) Inoperative - Inside
- Stop Lamps Always On
- Stop Lamps Inoperative
- Turn Signal Lamps and/or Indicators Inoperative
- Twilight Sentinel Inoperative
- Underhood Lamp Inoperative
- Vanity Mirror Lamp(s) Inoperative
- Repair Instructions
- Stop Lamp Switch Adjustment
- Stop Lamp Switch Replacement
- Fog Lamp Switch Replacement - Front
- Hazard Warning Switch Replacement
- Headlamp Control Module Replacement
- Daytime Running Lamps (DRL) Ambient Light Sensor Replacement
- Turn Signal Flasher Replacement
- Hazard Lamp Flasher Replacement
- Courtesy Lamp Replacement - Instrument Panel
- Instrument Panel (I/P) Compartment Lamp Switch Replacement
- Instrument Panel (I/P) Compartment Lamp Bulb Replacement
- Rearview Mirror Lamp Replacement
- Vanity Mirror Lamp Bulb Replacement
- Trans Floor Shift Control Indicator Lamp Replacement
- Underhood Lamp Replacement
- Underhood Lamp Bulb Replacement
- Headlamp Replacement
- Headlamp Bulb Replacement
- Headlamp Capsule Replacement
- Headlamp Opening Door Replacement
- Headlamp Opening Door Adjustment
- Headlamp Motor/Actuator Replacement
- Headlamp Bezel Replacement
- Headlamp Intermediate Bracket Replacement
- Headlamp Aiming (Visual Method)
- Headlamp Aiming (Export, LH Rule of the Road)
- Headlamp Aiming (Export, RH Rule of the Road)
- Fog Lamp Replacement - Front
- Fog Lamp Bulb Replacement - Front
- Fog Lamp Replacement - Rear
- Fog Lamp Bulb Replacement - Rear
- Fog Lamp Aiming Procedure
- Position Lamp Replacement - Front (Europe Japan)
- Position Lamp Bulb Replacement (Europe Japan)
- Repeater Lamp Replacement (Europe Japan)
- Repeater Lamp Bulb Replacement (Europe Japan)
- Marker Lamp Replacement - Side
- Marker Lamp Bulb Replacement - Side
- Park/Turn Signal/Side Marker Lamp Replacement
- Park/Turn Signal/Side Marker Lamp Bulb Replacement
- High Mounted Stop Lamp Replacement
- Cargo Lamp Replacement
- Cargo Lamp Bulb Replacement
- Backup Lamp Replacement
- Backup Lamp Bulb Replacement
- License Lamp Replacement
- License Lamp Bulb Replacement
- Tail Lamp Replacement
- Tail/Turn Signal Lamp Replacement (Europe, Japan)
- Tail/Backup Lamp Replacement (Europe)
- Description and Operation
- Exterior Lighting Systems Description and Operation
- Interior Lighting Systems Description and Operation
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.